Differences in defect indications of three artificially produced defects in ultrasonic inspection

Ari Koskinen, Esa Leskelä

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    Abstract

    Different types of artificial defects are used for qualification of ultrasonic inspection procedures, equipment and personnel for in-service inspections of nuclear components. To reliably evaluate the performance of an inspection, the defects have to be representative enough compared to the real service-induced defects. Fatigue cracks can nowadays be produced artificially as thermal fatigue or mechanical fatigue cracks. Thermal fatigue crack production is very well controlled in matter of size and opening and those cracks are very realistic option compared to the real service-induced defects. Mechanical fatigue crack production is a well-known and widely used method and can be used to produce very realistic cracks as well. Ultrasonic indications are highly dependent on defect characteristics like roughness, crack opening, tilt and branching. This work studies the influence of different reflector properties on defect indications. Two different types of artificial defects from different manufactures are inspected with conventional ultrasonic (UT), phased array (PA) and scanning acoustic microscope (SAM) techniques. The aim of the study is to get a wider perspective on the differences in similar type of defects from different manufacturers.
    Original languageEnglish
    Title of host publicationBaltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts
    EditorsPertti Auerkari, Juha Veivo
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages86
    ISBN (Print)978-951-38-8029-3, 978-951-38-8030-9
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    EventBALTICA IX - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
    Duration: 11 Jun 201313 Jun 2013

    Publication series

    SeriesVTT Technology
    Number107
    ISSN2242-1211

    Conference

    ConferenceBALTICA IX - International Conference on Life Management and Maintenance for Power Plants
    CountryFinland
    CityHelsinki-Stockholm
    Period11/06/1313/06/13

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  • Cite this

    Koskinen, A., & Leskelä, E. (2013). Differences in defect indications of three artificially produced defects in ultrasonic inspection. In P. Auerkari, & J. Veivo (Eds.), Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts (pp. 86). VTT Technical Research Centre of Finland. VTT Technology, No. 107 https://www.vtt.fi/inf/pdf/technology/2013/T107.pdf